Oh, I've forgotten my last post!
The kwak clock is now correctly installed in my marantz cd5003! The clicks were due to a bad connector to the ground.
Roushon, I'm very busy in these days because I'm working to my thesis for the bachelor degree at the university but for sure as soon as I've time, I'll let you know

Hi everybody!
As promised, I've ended and exposed my thesis and so we can now talk about our marantz cd5003. Here are my mods. For shure there will be other improvement to do but these make the marantz way way better than the stock one .
Enjoy

Put 0,1uF 50V X7R between the pins + and - of: C609, C610, C709, C710.
Put 0,1uF 50V X7R between ground and the pins VL, VA of DAC CS4392. Keep attention during the soldering of these two caps to avoid short circuit.

Bypass HDAM and muting circuit: remove R623, R723 and connect the node R627/C616 and R727/C716 (HDAM input) to the respective RCA output plug with 40uF (or 20uF + 20uF) MKP capacitor. This mod is a MUST. If during ON/OFF the cd player generates some “bump” sound, you can use two reed relays with 5V coil to put the output to GND and remove these bumps. The relays should be controlled from the input of Q603 and Q703 (to be tested but should work). The diodes D605, D606, D705, D706 provides about 4.5V on the cathode when the audio should be muted. If you do this mod, the swapping "C612, C712 -> 20uF + 20uF MKP" can be omitted because this mod bypasses C612/C712.

For minivreg, schematics are available on the web. Soon I’ll update my PCB design.

Congratulation on finishing your thesis! Thanks so much for painstakingly typing the detailed mod. I am taking print of this list and one of these days will open the player. First, I have to source the parts.

I did not understand the clock mod part. How does it help? Also are the schematics of the player available on the net?

Just looking at the schematics and surprised to see the use
of parts like 1N4003 and 78XX series regulators etc. I thought before I have a high-end cd player, now see that even in my LM3886 based amplifier I used better quality parts. Just dying to mod this player.

About the clock mod, the purpose it to have an external circuit to feed all the audio digital IC like the DAC and reduce jitter fluctuations. On this forum or on the web you can find tons of info about such kind of mod.

Hope the pics are useful. Bye!

michele

Last edited by michelino; 28th March 2013 at 03:36 PM.
Reason: missing info